MESON Chess Problem Database

Problem Display
PID: 26663 (3Rn1NK/r2BPp2/1bPkPN1R/2p1q3/2P5/6BQ/8/8 w - - 0 1)

Gulyaev, Aleksandr Pavlovich (aka Grin, AP)

Schach-Echo, 1975

3Rn1NK/r2BPp2/1bPkPN1R/2p1q3/2P5/6BQ/8/8

#2

12 + 7

2988 Izbrannie Kompozitsi 1985

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg3
      • 2.Qxg3#
    • 1...Qf4
      • 2.Bxf4#
    • 1...Sc7
      • 2.Be8#
  • Keys
    • 1.exf7!
      • threat
        • 2.fxe8S#
      • 1...Kc7
        • 2.fxe8S#
      • 1...Qxg3
        • 2.Qxg3#
      • 1...Rxd7
        • 2.Qxd7#
      • 1...Sxf6
        • 2.e8S#
      • 1...Qf4
        • 2.Bxf4#
      • 1...Sc7
        • 2.Be8#
      • 1...Sg7
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • Q(b);N_PINS(F),N_SPINQ(b),OGATE,XB(A)::QAB(B),XQ(b)
    • Q(b);N_PINS(F),OGATEB::B(A),XQ(b)
    • S(g);SBLOCK,S_CUTB(c),S_CUTR(e)::R(J)+B(H)
  • Actual
    • P(E);XP(f)
    • Threat
      • PXS(g)=S
    • Vars
      • K(d);S_FLIGHT::PXS(g)=S
      • Q(b);N_PINS(F),N_SPINQ(b),OGATE,XB(A)::QAB(B),XQ(b)
      • R(e);OGATE,P_SPINR(e),XB(H)::QAR1(B),XR(e)
      • S(g);OGATE,P_SPINS(g),XS(F)::P=S
      • Q(b);N_PINS(F),OGATEB::B(A),XQ(b)
      • S(g);SBLOCK,S_CUTB(c),S_CUTR(e)::R(J)+B(H)
      • S(g);N_PINS(F)::R(G)+S(F),DCHECK
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Developed and maintained by Brian Stephenson.
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